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參數(shù)資料
| 型號(hào)： | HT93214AT |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 1-memory Tone/Pulse Dialer |
| 中文描述： | 1內(nèi)存音頻/脈沖撥號(hào)器 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大小： | 194K |
| 代理商： | HT93214AT |
HT93214 Series
Rev. 1.10
6
October 2, 2002
Functional Description
Keyboard matrix
C1~C3, HKS and R1~R4 form a keyboard matrix. To-
gether with a standard 4 4 keyboard, the keyboard
matrix is used for dialing entries. The keyboard ar-
rangement of the HT93214 series is shown in the
Key-
board Information
.
Tone frequency
Tone
Name
Output Frequency (Hz)
% Error
Specified
Actual
R1
697
699
+0.29%
R2
770
766
0.52%
R3
852
847
0.59%
R4
941
948
+0.74%
C1
1209
1215
+0.50%
C2
1336
1332
0.30%
C3
1477
1472
0.34%
Note: % Error does not contain the crystal frequency
drift
Dialing specification selection
The specifications are selected by the MODE pin.
MODE
Tone/Pulse
Dial Rate
M/B Ratio
VDD
Pulse
10pps
1/2
VSS
Tone
Floating
Pulse
20pps
1/2
The MODE pin status is checked whenever a digit key
is pressed, however the M/B and pulse rate are deter-
mined at the first key entry.
Hand-free function operation
When HFO is low, a falling edge triggers the HFI, en-
abling the Hand-free function (HFO becomes high).
Reset Hand-free function
When HFO is high, the Hand-free function is enabled
and can be reset by:
Off-hook
Applying a falling edge to HFI
Hand-free function table
Current State
Next State
Hook SW
HFO
Input
HFO
Dialing
Low
HFI
High
Yes
On-hook
High
HFI
Low
No
Off-hook
High
HFI
Low
Yes
On-hook
of
off-hook
Low
Yes
Off-hook
Low
on-hook
Low
No
Off-hook
High
on-hook
High
Yes
Flash
Two flash keys are provided, namely F1, F2 for both se-
ries. All the flash key function as control key with differ-
ent break duration. Whenever a flash key is pressed the
PO pin will be forced low for a T
F
duration and the trans-
mission of the new digit key inputs will be further de-
layed for a T
FP
after T
F
. See the following table for flash
duration selection.
Item
F1
F2
HT93214
300ms
600ms
Key definition
0,1,2,3,4,5,6,7,8,9 keys
These are dialing number input keys for both the
pulse mode and the tone mode operation.
/T
This key executes the P
duration in the pulse mode. On the other hand, the /T
key executes the
function in the tone mode. The /T
key will occupy one memory digit in either tone or
pulse mode.
T function and waits a T
P
T
#
This is a dialing signal key for the tone mode only, no
response in the pulse mode.
F1, F2
Pressing one of the flash keys will force the PO pin to
become low for the T
F
duration. To transmit the dial
signals of the key input that are entered after the F
key, a wait period T
FP
(sec) after PO pin returns from
low is provided.
P
Pause key. The execution of this key pauses the out-
put for the T
P
duration (2.2s).
R
Redial key. It executes redialing as well as one-key re-
dial function.
相關(guān)PDF資料 |
PDF描述 |
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| HT93214B | 1-memory Tone/Pulse Dialer |
| HT93LC46 | 1K 3-Wire CMOS Serial EEPROM(1K CMOS 三線控制串行EEPROM) |
| HT93LC56 | 2K 3-Wire CMOS Serial EEPROM |
| HT93LC66 | 4K 3-Wire CMOS Serial EEPROM |
| HT93LC86 | CMOS 16K 3-Wire Serial EEPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT93214B | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:1-memory Tone/Pulse Dialer |
| HT93214BL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| HT93214BLT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| HT93214BT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| HT93214C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
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